奥运公园龙形水系高效过滤技术研究与应用

结合北京奥运会的重点工程——北京奥林匹克公园中心区龙形水系高效过滤、强化去磷系统工程;综合最新的过滤技术、吸附除氨氮技术、除磷技术、除藻技术和介质再生技术,研究开发了集成化的高效的水净化循环处理系统。研究结果表明龙形水系高效过滤、强化去磷系统微絮凝的最佳选择为PAC,最佳投药量为3.0 mg/L;沸石作为本系统吸附除氨氮的主要物质,其介质最好粒径范围:(1.0～2.0)mm,最佳无机改性剂为NaCl,且NaCl不会造成新的污染,每克沸石具有吸附18.0 mgNH3-N的极限潜力;本系统最佳的水藻抑制剂为澳大利亚的Alge Strave高浓缩水藻抑制剂,可以破坏水藻抑制剂,对鱼类未产生不良影响。     

A penta‐band hybrid fractal MIMO antenna for ISM applications

A miniature two‐element MIMO multiband planar patch antenna with potential applications in the ISM bands is presented. The elements of the antenna have been designed using a novel hybrid fractal geometry based on an altered Dragon Curve and the Inverted Koch. Reduced antenna dimensions are obtained with acceptable performance even at lower frequency ranges. The antenna elements are placed adjacent to each other with a very small spacing of 0.004 λ₀ (λ being the free space wavelength of 433 MHz), confining the antenna dimensions to 51 × 50 mm². The antenna resonates at the 433 MHz (ISM), 2.4 GHz (ISM), 3.9 GHZ (Fixed Satellite), 4.7 GHz (UWB) and 5.8 GHz (ISM) frequency bands. The antenna exhibits |S₁₁| ≤ ?10 dB, |S₂₁| ≤ ?16 dB, an ECC ≤ 0.01 for all operating frequencies, with circular polarisation at the 2.4 GHz and 5.8 GHz bands and linear polarisation at the others. The simulated structure was fabricated and tested, with the simulated and measured results displaying acceptable agreement.     

欲望与自我戒律之间的斗争——用多模态话语分析解构“卧虎藏龙”中玉娇龙之人物性格

电影语篇是多模态系统共同构建意义的典型范例。＂卧虎藏龙＂一片通过影片中多模态系统的完美结合,成功地塑造了一个不同于以往武侠片的女性角色———玉娇龙,导演李安借这个人物的悲剧告诫观众———任何人都要在欲望与自我戒律之间达到制衡,否则会自毁其生。本文从批评语言学角度出发,用多模态话语分析的方法,解析电影语篇＂卧虎藏龙＂中视觉模态、听觉模态以及文本（对白）等如何互动来构建玉娇龙之人物性格,以表达影片的主题。     

论苗族服饰中龙纹图案染织绣技艺之美

以苗族服饰中龙纹图案为对象,从技术与艺术两方面对其作了具体分析和研究,尤其是对纹样的织造和刺绣进行了详尽分析,直观地展现了其工艺技术之美,为当代服装设计提供了借鉴。     

中国传统建筑室内装饰中的龙凤图腾

尽管社会的结构和人的意识形态在发生不断的变化,人的审美认识能力和审美表现能力在不断地深入和提高,但龙凤文化艺术却在变化中始终保持它经久不衷的魅力。龙风艺术经历了从低级到高级、由简单到复杂、朴素到华丽、不足到充实的过程。     

Maturity sorting index of dragon fruit: Hylocereus polyrhizus

The purpose of this research was to investigate maturity prediction of red flesh dragon fruit based on non-destructive measures. Specific weight, sphericity, color value L, a, b and light reflectance spectrum were linearly combined by partial least squares regression (PLSR) analysis. The PLSR models could predict days after fruit set, weight ratio and total soluble solids relatively well with standard deviation divided by standard error of prediction (RPD) of 2.86, 2.45 and 2.38, respectively. Date after fruit set, total soluble solids, total acid, ratio of total soluble solids and total acidity and weight ratio were transformed into a principal component 1 (PC1) by the principal component analysis and used to represent a single maturity index. The PLSR model with non-destructive parameters resulted in an improved performance in the prediction of the maturity index (PC1) with a RPD increase to 3.49. The model could be further simplified but retained a comparable accuracy by the application of a log (R680/R550) in place of the light reflectance spectrum.     

Dragon Fruit (Hylocereus spp.) Seed Oils: Their Characterization and Stability Under Storage Conditions

Oil was extracted from the seeds of white-flesh and red-flesh dragon fruits (Hylocereus spp.) using a cold extraction process with petroleum ether. The seeds contained significant amounts of oil (32–34 %). The main fatty acids were linoleic acid (C18:2, 45–55 %), oleic acid (C18:1, 19–24 %), palmitic acid (C16:0, 15–18 %) and stearic acid (C18:0, 7–8 %). The seed oils are interesting from a nutritional point of view as they contain a large amount of essential fatty acids, amounting to up to 56 %. In both dragon fruit seed oils, tri-unsaturated triacylglycerol (TAG) was mainly found while their TAG composition and relative percentage however varied considerably. Therefore, they showed a different melting profile. A significant amount of total tocopherols was observed (407–657 mg/kg) in which the α-tocopherol was the most abundant (~72 % of total tocopherol content). The impact of storage conditions, cold and room temperatures, on the oxidative stability and behavior of tocopherols was monitored over a 3-month storage period. During storage, the oxidative profile changed with a favorably low oxidation rate (~1 mequiv O₂/week) whilst tocopherols decreased the most at room temperature. After 12 weeks, the total tocopherol content, however, still remained high (65–84 % compared to the initial oils). Hereto, the dragon fruit seed oils can be considered as a potential source of essential fatty acids and tocopherols, with a good oxidative resistance.     

High surface area and mesoporous activated carbon from KOH-activated dragon fruit peels for methylene blue dye adsorption:Optimization and mechanism study

In tnis study,an alternative precursor for production of activated carbon was introduced using dragon fruit(Hylocereus costaricensis) peel(DFP).Moreover,KOH was used as a chemical activator in the thermal carbonization process to convert DFP into activated carbon(DFPAC).In order to accomplish this research,several approaches were employed to examine the elemental composition,surface properties,amorphous and crystalline nature,essential active group,and surface morphology of the DFPAC.The Brunauer-Emmett-Teller test demonstrated a mesoporous structure of the DFPAC has a high surface area of 756.3 m~2·g~(-1).The cationic dye Methylene Blue(MB) was used as a probe to assess the efficiency of DFPAC towards the removal of MB dye from aqueous solution.The effects of adsorption input factors(e.g.DFPAC dose(A:0.04-0.12 g·L~(-1)), pH(B:3-10),and temperature(C:30-50℃)) were investigated and optimized using statistical analysis(i.e.Box-Behnken design(BBD)).The adsorption kinetic model can be best categorized as the pseudo-first order(PFO).Whereas,the adsorption isotherm model can be best described by Langmuir model,with maximum adsorption capacity of DFPAC for MB dye was 195.2 mg·g~(-1) at 50℃.The adsorption mechanism of MB by DFPAC surface was attributed to the electrostatic interaction,π-π interaction,and H-bonding.Finally,the results support the ability of DFP to be a promising precursor for production of highly porous activated carbon suitable for removal of cationic dyes(e.g.MB).     

德庆悦城龙母祖庙（一）

岭南历史最久远、地方特色最浓厚的当属悦城龙母祖庙。龙母祖庙座落在西江北岸，庙中所祀奉的是龙母。龙母祖庙虽然所处地势较低，但因采取了一系列有效的防洪措施，故经受住了多次洪水冲淹而不毁。龙母祖庙中轴线上的主体建筑尚属完整。龙母祖庙与古越族的文化史息息相关，在岭南文化史及民族史上均有着不可低估的地位。     

天安门城楼外檐金龙和玺彩画（本期中心彩色插页）说明

天安门城楼重油饰彩画修缮按原明清时期的传统彩画制度，外檐梁枋彩画装饰了金龙和玺。和玺彩画为明清彩画等级中最高制度。金龙和玺以金龙为此种彩画的装饰题材。它为沥粉片金加攒退做法。各主要纹路部位的划分安排基本上同龙草和玺彩画，各主要线路均沥粉贴金，各种主要线路都施以晕色。